Paper-feeding mechanism



c. SPIROU PAPER FEEDING MECHANI SM. APPLICATLON FILED FEB. :4. 1920.

1 3833750 Patented July 5, 1921 2 SHEETS-SHEET I.

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INVENTOR. C/m EL ES SP/fio BY 0 K C. SPIRO.

I PAPER FEEDING MECHANISM.

APPLICATION FILED FEB. 14, 1920.

, 193%;775', Patented July 5, 19210 2 SHEETS-SHEET Z. fiw a 2a 17 JCT 12 l WITNESS: INVENTOR.

A TTORNE Y warren e r-ares parser crates.

CHARLES SPIRO, on NEW YORK, 'N. Y., ASSIGNOR TO EEDERAL'ADDING MACHINE coRro ArIoN, on NEW YORK, N. Y A CORPORATION on NEW JERSEY.

PAPER-FEEDING- MECHANISM.

Patented July 5, 1921.

Application filed February 14, 1920. Serial No. 358,592.

To all whom it may concern:

Be it known that I, CHARLEs SPIRO, citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Paper- Feeding Mechanism, of which the following is a specification.

This invention has relation to a paper feeding mechanism of a typewriting machine, and more specifically to improvements in such a mechanism designed for a typewriting machine of the front strike bar type.

The principal object of the inventlon 1s to provide a paper feeding means, the elements of which cooperate to produce a mechanism which will etficiently feed the paper upon the platen of a typewriting machine of this character. A further object is to provide a mounting of paper fingers, bothfrontand rear, the front paper fingers belng ad ustable and cooperating with the rear fingers and the feed roll carrier to insure the proper feeding of the paper. A further object is to provide a specific mounting for the front paper fingers andsupporting slide bar therefor to the end that no undue pressure will be exerted upon the paper fingers themselves and to permit the convenient. removal of the platen from the carriage.

Other and further objects of this invention will in part be obvious and will in part be pointed out in the specification by reference to the accompanying drawings, 1n which like numerals are used to indicate like parts throughout the several figures, and the scope of-the invention will-be indicated by the ap' pended claims.

In the drawings,

Figure 1 is a plan view of the carriage of a typewriting machine showing the parts necessary to the illustration of the improved paper feeding mechanism,

Fig. 2 is a section on the line 2-2 of Fig. 1, showing the relative positions of the front and rear paper fingers and the mounting of the side edge guide upon the paper table,

Fig. 3 is a. similar section on the line 33 of Fig. 1, showing the means employed for mounting the severalcelements of the paper feeding mechanism within the carriage of the machine,

Fig. 4 is a perspective illustrating the slidable mounting of the front paper fingers upon the slide bar,

are. carried by the table and disposed atop} Fig. 5 is a perspective of the side edge paper guide removed from the paper table,

Fig. 6 is a view in elevation of the paper table and feed roll carrier removed from the machine, and showing the mounting of the rear paper fingers, and

Fig. 7 is adetail of the locking shoulder of the slide bar supporting arms.

The carriage frame of the machine comprises the bottom bars 10, 1O, connecting the end risers 11, l1, to which are attached the said carriage frame members 12, 12. In these sidecarriage frame members are mounted the usual parts which carry the manipulating members of the carriage and' paper feeding mechanism. 13 represents the platen while 14 is the paper table secured to the bar 15 by screws 16 and held tensioned'by the spring 17 so that the paper table will normally lie against the bar 18. This mounting of the paper table causes the paper feed rolls 20, 21 and 22 to press against the under face of the platen 13; The center roll 20 and the side rolls 21 and 22 are mounted in a roll carrier-23 shown in Fig. 6 and this roll carrier in turn is mounted in a universal manner upon the projection 24 of the paper table by means of a pivotal connection 25. The rear paper fingers 19 posite ends of the roll carrier 23 and slightlyspaced from the platen so as not to interfere with the tension of the feed rolls there ,1 on. The supporting bar 15 of the paper tae ble may be rocked by the hand lever 25 ,9 which is pivotally mounted upon the bar 18 to release the rolls 20, 21 and 22 fromcon tact with the platen. This hand levef is provided with a stud 50, which bears against the under side of the paper table and causes 5 by its movement the paper table to swing,

and is also formed with a lug 51 which travels in slot 52 in' the side frame of the carriage to define'the limits of movement of the hand lever. The front paper finger support is .designated by the numeral 26 and is mounted upon a pair of arms 27 pivoted at 28 to the side carriage frame members 12, 12, and tensioned by the spring 29 toward the platen. They are limited in their movement toward the platenby the platen-lock bars '30 by reason of the shoulder 31 provided upon the arms 27, shown in detail in Fig. 7. The scale support 31 forms a stop or limiting means for the arms 30 in the opposite direction. The platen holding bars 30 lock the platen in position in the carriage frame,

being notched at 53 to receive the platen shaft'54, as best shown in Fig. 3. Spring 32 maintains the lock bars' 30 in normal position. It will be noted that this spring is secured at one end to a stud 55 upon the carriage frame member 12 and at the other end to a stud 56 upon the lock bar 30, while the spring 29 is connected at one end to a stud 57 upon the arm 27 and at its other end to the stud 56 before mentioned. The spring 32 is of greater strength than the spring 29, which will permit of the movement of the arms'27 without affecting the lock bar 30. Due to the presence of the shoulder 31, as shown in Fig. 7, the release of either of the platen lock bars will cause the front finger support to be moved away from the platen.

This construction is particularly adapted to permit the direct vertical removal of the platen from the carriage, and the movement of the locking bars for that purpose automatically withdraws the paper fingers from the path of the platen.

The front paper fingers 33, 33, are slidably mounted in the channel support 26 and the structure which accomplishes this result is shown in Fig. 4. The paper finger has the usual curved portion 34 conforming to the contour of the platen and the usual roll 35. The stem of the finger is designated by the numeral 36 and comprises the connecting shank 37 and the duplicate sidelugs 38, 38, which have enlarged heads to slide and intGI'lOiCk within the channel supporting bar 26. A leaf spring 39 lies within the channel support between ,the lug heads, providing a binding of the parts, so that accidental movement of the finger stem 36 upon the support 26 will not take place. The binding occurs between the flanges of the channel bar and the inner faces of the lugs 38, and a pressure upon the central portion of the stem will be transmitted to the leaf spring and relieve the frictional contact between the parts to permit ready movement of the fingers longitudinally of their support. It will be noted that the shank 37 depends from one end of the body of the stem 36, which permits the adjustment of the fingers for the full width of the platen while retaining a broad bearing upon the slide bar or support.

The tips 40 of the front paper fingers ap-' proach closely the tips 41 of the rearpaper fingers, asshown in Fig. 2, but they may abut or slightly overlap, for the'purpose of providing a practically continuous guide for the paper around the platen.

One or more side edge guides 42 are mounted upon the paper table 14. Each paper guide comprises an embracing portion 43, which straddles the upper edge of the paper table, and a guide flange proper 44. The body portion consists of two sections 45 and 46, at the junction 47 of which is formed a pocket, which embraces the upper edge of the paper table. The two portions of the body being made of resilient material, the free upper and lower edges thereof grip the paper table upon the front and rear faces thereof at points removed from each other and spaces the intermediate portion from the table, as shown in Fig. 2, constituting a double grip for preventing accidental longitudinal movement. To revent the removal of the guide from the table in. an upward or lateral direction, a longitudinal groove 48 'is provided in the paper table, within which groove friction pins or projections 49, 49, carried by the guide, rest. These pins may be provided with a fiber contact face to produce a frictional resistance in the longitudinal adjustment of the edge guides and to maintain their movement in a straight line or path relative to a-scale 58 upon the p per table without scratching or injury thereto.

. The operation of the paper feeding mechanism is efficient and simple. The edge guides are moved against the frictional contact produced by the ends of the resilient body portion thereof along the scale 'provided at the upper edge of the paper table until the proper spacing is attained for'the width of paper desired to be fed to the platen. The two side edge guides form an accurate means for properly resenting the sheet ofpaper or envelop to t e platen. In this position the paper or envelop is gripped between the feed rolls 21, 22, and the platen, and advanced to a position to be gripped between the roll 20 and the platen.' The rear paper fingers at either side of the feed roll carrier 23 hold the edges of the paper or envelop and guide them toward and upon the front paper fingers, which in turn guide it to the position for printing and finally from the machine. a

It will thus be apparent that thereis a cooperating feeding relation between the several parts as acontinuous guiding surface is provided between the fingers carried by the paper table and the front paper fingers. The side edge guide is adapted to be formed of a single piece or blank and removably applied to' the paper table, so as to be held in position thereon by the resiliency of the body of the guide The construction and mounting of the front paper fingers is such as to permit their convenient adjustment relative to the fingers from the paper table, and the bodily withdrawal of the front fingers and their supporting slide bar from the path of the platen when the lock bars are moved to permit the platen to be removed the lock bar and slide bar arm limits the travel of the latter in one direction and permits the joint operation of these parts in an opposite direction, the extent of which is determined by contact with a fixed part of the machine carriage. The contact between the lock arm and slide bar arm determines the position of the paper fingers relative to the platen and also the degree of tension under which these arms are held in feeding. relation.

It will be seen that this invention presents a simple, eflicient and economically manufactured paper feeding mechanism for a typewriting machine, and while the specific construction of the several partshas been shown and described, the invention is not limited thereto except as required by the following claims.

What I claim is:

1. In a typewriter, the combination of a platen, a paper table pivoted at the rear thereof and having rear paper fingers extended therefrom, and front paper fingers pivotally mounted beneath the platen axis to cooperate with the rear paper fingers and provide a substantially continuous guiding surface for the paper.

2. In a typewriter, the combination of a platen, a paper table having rear paper fingers attached thereto at opposite ends, a paper feeding device carried by the table intermediate of said fingers, and slidable front paper fingers pivotally mounted with relation to the platen and rear paper fingers to provide a guiding surface for the paper.

3. In a typewriter, the combination of a platen, a aper table having rear paper fingers attac ed thereto and a bearing projection thereon, a feed roll carrier mounted universally upon said projection, and front paper fingers mounted with relation to said platen and rear paper fingers to provide a substantially continuous guiding surface for the paper. v

4. In a typewriter, the combination of a platen, a paper table having rear paper fingers attached thereto and a bearing projection thereon, a feed roll carrier mounted universally upon said projection, and front paper fingers slidably mounted with relation to said platen, feed roll carrier and rear paper fingers to provide a cooperating guiding surface for the paper.

5. In a typewriter, a platen, a feed table at the rear thereof having fingers extending beneath the platen, a feed roll carrier universally pivoted intermediate said fingers, and cooperating depending front fingers disposed to provide a guiding surface about the periphery of the platen.

6. In a typewriter, a platen, a feed table at the rear thereof having fingers extending beneath the platen, cooperating depending front fingers, and a feed roll plate or carrier disposed between the fingers from the paper table and pivoted upon said table.

7. In a typewriter, the combination of a carriage, a-platen mounted therein, a lock bar engaging the platen axis, for holding said platen in said carriage, and a front paper finger support comprising a bar and supporting arms therefor, one of said supporting arms being mounted in the path of said lock bar, to be engaged thereby and moved away from the platen.

8; In a typewriter, the combination of a carriage, a platen mounted therein, manually operated pivoted lock bars engaging the platen axis for holding said platen in said carriage, a front paper finger support comprising a bar and pivoted supporting arms therefor, and engaging means between said pivoted members, whereby a release movement of a lock bar yvill cause the finger support to be moved away from the platen.

9. In a typewriter, the combination of a carriage, a platen mounted therein, lock bars for holding said platen in said carriage, a front paper finger support comprising a bar and supporting arms therefor, said supporting arms being mounted in the path of said lock bars, to be engaged thereby and moved away from the platen, and tensioning means for one lock bar and supporting arm ar ranged to permit movement of the finger support independent of the lock bar.

10. In a typewriter, the combination of acarriage, a platen mounted therein,lpivot,ed lock bars for holding said platen in said carriage, a front paper finger support comprising a bar and pivoted supporting arms therefor, engaging means between said pivoted members whereby a release movement of a lock bar will cause the finger support to be moved away from the platen, and independent tensionlng means for said pivoted members arranged to permit, movement ofthe finger support without affecting the lock arms.

11. In a typewriter, the combination of a platen either jointly mounted in said carriage, pivoted lock bars .for holding said platen in said carriage, a

upon one of said pivoted members to bring the upper ends thereof out of vertical alinement and provide an engagement for the other of said members, whereby the sup porting arm maybe moved away from the with the lock bar or independently thereof.

14. In a typewriter, the combination of a carriage and its frame, a platen therein, lock bars for the platen, a front paper finger support comprising supporting arms, the said lock bars and supporting arms being pivoted I to the carriage frame,a tensioning spring connecting each of said lock bars to the carriage frame, and a second tensioning spring connectlng each of said lock bars with its companion supporting arm, the first tensioning spring being ,of greater strength than the second, whereby the supporting arms may be moved away from the platen without affecting the lock bars.

15. In a typewriter, the combination of a carriage and its frame, a platen therein, lock bars for the platen, a front paper finger support comprising supporting arms, the

either jointly with the lock bar or independently thereof, a tensioning spring connecting the lock bar to the carriage frame, and a second tensioning spring connecting the lock and the supporting arm, the first tensioning spring being of greater strength than the second, whereby the independent movement of the supporting arm may be accomplished withoutalfecting the lock bar;

16. A paper finger support comprising a channel member, a paper finger comprising a shank having an enlargement within said channel, and a spring disposed between said member and shank for causing a binding between said enlargement and the flanges of said channel -member.

17. A paper finger support comprising a channel member, a paper finger comprising a shank having a pair of enlargements slidably resting within said channel member, and a spring within said channel and between said enlargements bearing against said shank to cause a binding between said enlargements and the flanges of said channel.

18. In a typewriter, the combination of a carriage frame, a platen removably mounted therein, a bar provided with arms pivoted upon the carriage frame having the platen bearing and movable laterally into contact with the axis thereof, and depending paper fingers carried by said bar.

In-testimony whereof I ailix my signature.

CHARLES SPIRO. 

